Attachment to steel brakes.



J. N. HENDERSON.

ATTACHMENT TO STEEL BRAKES.

APPLICATION FILED MAR. 30, 1911.

v 1,050,274, Patented Jan. 14, 1913.

2 SHEETS-SHEET l.

Tness es lfiz/enzor 1% ww 57 W 4W J. N. HENDERSON.

ATTACHMENT TO STEEL BRAKES.

APPLICATION FILED MARJO, 1911.

Patented Jan. 14, 1913.

2 SHEETSSHEET 2.

UNTTED STATES JAMES NICHOLAS HENDERSON, 0F SASKA'I'OON, SASKATCHEWAN, CANADA.

ATTACHMENT TO STEEL I BRAKES.

0 all whom it may concern:

Be it known that Llmrns NICHOLAS HEN- DERSON, of the city of Saskatoon, in the Province of Saskatchewan, Canada, have invented certain new and useful Improvements in Attachments to Steel Brakes, of which the following is the specification.

My invention relates to improvements in steel brakes for bending sheet metal, and the object of the invention is to provide an attachment whereby one can definitely and quickly ascertain the angle through which the sheet is bent, and it consists essentially in a quadrant having degrees notated thereon,the quadrant being attached toa movable part of the machine, and an index pointer operating over the quadrant and secured to a stationary part of the machine, the parts being arranged and constructed as hereinafter more particularly described.

Figure 1 is an end view of a steel brake fitted with my invention. Fig. 2 is a front elevation of a portion of the end of a steel brake showing my invention applied. Fig. 3 is an enlarged detail side elevation of the quadrant. Fig. 4 is a plan view of the quadrant, part being removed to expose construction. Fig. 5 is an enlarged detail plan view of the index pointer. Fig. 6 is an enlarged perspective view; and Fig. 7 is an enlarged end view.

In drawing like characters of reference indicate corresponding parts in each figure.

1 represents the supporting legs of a brake at one end thereof, which legs support the casting 2 having the upper forward corner constructed so as to form the central portion 2 of a hinged joint made with the projecting ends 3 of a plate 3 permanently secured to the apron or bending leaf t. A pin.5 connects the parts 2 with the ends 3.

6 is the upper jaw of the machine, which jaw is controlled by the lever 6 in the usual way. The apron at is counterbalanced by a weight 7 located at the end of a rod 8 extending from the apron.

The parts above described form no part of my invention, but are introduced in the application to show how my invention is applied.

lVith a machine as above described I have found difficulty in bending sheets to a re- Specification of Letters Patent.

Application filed. March 30, 1911.

Patented J an. 14, 1913.

Serial No 618,041.

quired angle, as no means is attached whereby the angle between the apron and the j aw can be determined, and in order to overcome this difliculty I have provided the attachment now described.

9 is a quadrant having its outer edge flanged backwardly at 10 and marked with numbers representing degrees as at 11. The quadrant is made from thin steel plate and has the flange formed concentric to a central opening 12, which opening is adapted to receive snugly the pin 5 when the body of the plate is inserted between the central member 2 of the casting 2, and the outer portion 3 of the plate 3. The quadrant is supplied with a lug 13 provided with an opening 13 which receives a pin 14 screwed tightly into the outer member 3 of the plate 8, so that the quadrant is held firmly in position.

15 is an index pointer playing over the flange (degree scale) of the quadrant, which pointer has the base thereof enlarged and slotted at 15', and is held to the portion 2 of the casting 2 by an adjusting screw 16 which passes through the elongated slot 16. This construction allows the pointer to be reiet at any time it is not registering proper y.

When placing the quadrant and index pointer on the brake, it is necessary to have the indeX pointer register with the mark indicating zero,'or no degrees, on the quadrant, when the apron is down. If this be done and the parts be fastened firmly the angle through which the apron is swung can be determined at any time by simply referring to the quadrant where the degrees can be read off.

What I claim as my invention is:

In a machine of the class described, the combination with a suitably supported casting formed with a projecting hinge member, a plate supplied with complementary hinge members, a pin securing all of said hinge members together pivotally, and an apron carried by the plate, of a quadrant centered on the pin and extending between the hinge members, said quadrant having its outer edge supplied with a flange having degrees notated thereon, means for fastening the quadrant to one of the hinge members formed with the plate an index pointer operating over the flange and provided with a base having an elongated slot therein, and an adjusting screw passing through the slot and holding the pin firmly to the hinge member stormed Within the casting, as and for the purpose specified.

Signed at Winnipeg in the Province of. Manitoba this 17th day of February, 1911.

JAMES NICHOLAS HENDERSON.

In the presence 01- G. S. ROXBURGH, J. K. ELKIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

